Abstract: A aerodynamic surface structure assembly for a high speed, high acceleration, motorized vehicle, such as a drag racer, having at least one aerodynamic wing with a camber surface positioned to create a down force on the vehicle, an engine producing high velocity exhaust, and exhaust gas channelling pipes or plenums, where the exhaust gas is passed directly across the wing to produce the down force. The assembly includes baffles to create laminar gas flow and a housing to prevent ambient air from flowing across the wing. Preferably, a pair of wings are provided, one wing being mounted in front of each rear wheel.